Steenoe, i would be very pleased, if you could post your'e setup including the connection of the volume-regulation, and the size of that. ...

Well, it's not that i got the time right now (finishing up my pearl/dac/switch/psu enclosure's). But i allways have the problem, with 'a little too little gain' - So this could very well be my next project.

Originally posted by Blues Steen is the man! Is this the robust preamp Mr. Pass promised? R Cray is my man too! Battery ps is the way to go with a simple circuit like this. Parallel a couple more and it should last a lifetime

I have no idea, but robust it is indeed! Man this little thing rocks the place to no end. Its even more powerfull then the NS10 Me surprised to no end!!!!
I might even consider to go dualmono, using 4 batteries I am blasted off my chair Build one and listen for yourself! There is not even the slightest noise at full throttle!! Takes an hour to solder this thing together
lykkedk, the pot is a 10k logpot at the input of the preamp! You are more than welcome to have a look (and listen) for yourself.
Ohh, the battery holder is there to keep them from bouncing around...........He-he

whatever combination ;say one 12V/4Ah plus one 6V/4Ah in series ; or two twelves ; or yourfavenumber of single cells ;

charger - LM317 in CCS mode - Icharge set to 1/50 to 1/100 of declared current capacity , so there is no need for any schmanzy elektor like processor based clever circuit - you can leave it on for good,and switching it off only when you listen da muzak

I know that........... I've run Quad 33 for 3 yrs that way ,with one Yuasa 12V/7Ah